IEEE Communications Magazine · 1998 · 593 citations · 11 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationInformation TheoryWireless CommunicationsChannel CodingCoding TheoryMobile CommunicationModulationSpread Spectrum CommunicationWireless NetworksCellular Communication NetworksCellular NetworksDirect-sequence Spread SpectrumInformation SpreadingSignal Spreading CodesSpread Spectrum ModulationSpreadingSpreading Codes
This article presents an overview of the spreading techniques for use in direct sequence CDMA cellular networks. We review the theoretical background for sequences used in CDMA and wideband CDMA, and discuss the main characteristics of the maximal length, Gold (1967, 1968), and Kasami sequences, as well as variable- and fixed-length orthogonal codes. We also describe different methods of multiple spreading for channelization and scrambling in CDMA and W-CDMA realizations.
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